Tonga earthquakes

M4.6 earthquake 157 km SSE of ‘Ohonua, Tonga

A magnitude 4.6 earthquake struck 157 km SSE of ‘Ohonua, Tonga on Tue, Aug 31, 2021, 3:48 AM GMT+13 (14:48 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.9 83 km SSE of ‘Ohonua, Tonga. This one was a foreshock.

Nuku‘alofa forecastMore in Tonga

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
4.6 (mb), light
Local time
UTC
2021-08-30 14:48:21 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
22.620° S, 174.306° W
Region
Tonga
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 11.3 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.15
Depth from
Operator assigned
Station coverage gap
112°
Stations used
25

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.6 and up: 7 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 5.983 km SSE of ‘Ohonua, Tonga · 1851 days ago · 10 km deep · 74 km away · felt by 3
  2. 4.3197 km SSE of ‘Ohonua, Tonga · 1850 days ago · 10 km deep · 51 km away
  3. 4.7171 km SSE of ‘Ohonua, Tonga · 1841 days ago · 10 km deep · 15 km away
  4. 4.280 km S of ‘Ohonua, Tonga · 1838 days ago · 35 km deep · 97 km away
  5. 4.3146 km SSE of ‘Ohonua, Tonga · 1826 days ago · 10 km deep · 16 km away
  6. 4.5139 km SSE of ‘Ohonua, Tonga · 1802 days ago · 10 km deep · 30 km away
  7. 5.0169 km S of ‘Ohonua, Tonga · 1799 days ago · 10 km deep · 69 km away

Before

  1. 4.8158 km SSE of ‘Ohonua, Tonga · 1865 days ago · 10 km deep · 2 km away
  2. 5.0113 km SSE of ‘Ohonua, Tonga · 1868 days ago · 10 km deep · 47 km away
  3. 4.4228 km S of ‘Ohonua, Tonga · 1869 days ago · 10 km deep · 95 km away
  4. 4.5154 km SE of ‘Ohonua, Tonga · 1872 days ago · 10 km deep · 62 km away
  5. 5.6127 km SSE of ‘Ohonua, Tonga · 1874 days ago · 10 km deep · 34 km away
  6. 4.6157 km SSE of ‘Ohonua, Tonga · 1879 days ago · 10 km deep · 13 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000f99p. Read Wed, Sep 30, 2026, 10:17 PM UTC.